Class D is just Dandy!

feed-forward loop

Feed forward was used in the old days, and it was resurrected again by Rogue in their M120 and I believe in their M150/180's.

Cheers George 

Hi George,

Feed forward in a linear amplifier is very different. :)

In this case, I’m using it more as an analogy or principle rather than a specific circuit design.

While most amplifiers have feedback at the output stage, the Technics does the correction mathematically at the input, pushing the error compensation from the front instead of the back.

For this reason, I think of this as a feed-forward idea, being the opposite of feed-backwards.

Best,

E

Curious if any of you have tried the Pioneer Elite AVRs and taken a serious listen to the D3 Amplifiers.  I am pretty sure Onkyo now owns them all.    I use them for 2-channel, it is musical, fatigue free, harmonically accurate to my ears.   I does lack the warmth and SLAM if my good Sim Audio separates on my main rig for audio.   But I have to say that in many respects it is more accurate in coherent at about 1/20th the price :).    I can listen to it all day long without issue.   Any other receiver I have owned doesn't come close.         It maybe just me, since I dont hear much about AVRs taken seriously for audio.

Erik,
What a most informative thread you have going here!   Thanks to the fellows above who share their take on the progression of the design of amplifiers.  I won't be parting with my delightful Dennis Had Inspire EL84 SET anytime soon, but this Class D amplification has come of age and will only get better in the future.  

Several of the Class D amps mentioned above are uber-expensive and clearly out of my budget, but likely not for others.   This technology will emerge in more modestly-priced gear in time, such as with the Wyred4Sound gear that can be had for a song.  BTW, a pal sent me a note recently telling me that he had acquired a pair of Nu-Force mono's and they bested his high-end Pass Labs amp by a fair margin.  

I read elsewhere that RF interference can be a problem with these amps, as well as the need for power conditioners and better power cords, so this may be an issue to be aware of.  Cheers, Mark  

Welcome @whitestix  !

I am glad you are finding it informative, I'm learning a lot more about the marketplace, and happy to find so many sharing my appreciation for the latest amps!

Best,

E